i iS 



species with from five to ten teeth, usually eight or nine, in a specimen from Lion's Head, 

 South Africa (Stebbing, 1. c.) eight teeth stood on the upper border of the rostrum and according 

 to Col. Alcock in the species from the coasts of India the rostrum is also armed with from 

 five to eight - - usually eight — teeth. In the variety semilaevis Bate the usual number of 

 dorsal teeth on the rostrum of medium-sized specimens proved to be si.x, less usually se ven, 

 while eight teeth were rarely observed: among 66 medium-sized specimens the rostrum was 

 armed dorsally in 35 with six, in 21 with seven, in 6 with eight and in 4 with five teeth. In 

 the full-grown male from Stat. 173 there were also eight teeth, but this belongs no doubt 

 to the exceptions. Usually in specimens of medium size the two first teeth stand on the carapace 

 behind the orbit, more rarely t h r e e are observed : among the 66 specimens in 48 two teeth 

 stood on the carapace, in 1 6 three and in 2 four, a great exception indeed. These two or three 

 teeth that stand on the carapace, are almost constantly considerably smaller than the following. 

 In the young specimens from the Stations 306 and 312 the usual number of teeth on the 

 dorsal side of the rostrum proved to be seven, more rarely six or eight, while in an ova- 

 bearing female, the carapace of which was 9111111. long, nine dorsal teeth stood on the latter : 

 among 34 specimens from these Stations in 21 seven teeth were observed, in 5 six, in 7 eight 

 and in 1 nine. In these specimens the anterior tooth stands usually a little before the distal 

 extremity of the antennular peduncle to near the tip of the antennal scales, which fact does 

 never occur in the older specimens; in these younger individuals more often three teeth are 

 placed on the carapace than in the larger ones, among the 34 examined in 1 S three, in 1 5 

 two teeth were observed, while in an ova-bearing female, in which the carapace and the rostrum 

 were respectively 9,25 mm. and 24 mm. long, four teeth were placed on the carapace. 



The rostrum is continued backwards as a blunt carina, which in the adult male evanesces 

 a little behind the middle of the carapace; posterior to the carina one observes, like in other 

 species, in the mid-dorsal line a very small tubercle, situated about twice as far from the carina 

 as from the hind margin of the carapace and in old individuals, like in the male from Stat. 173, 

 the cardiac region appears moreover a little uneven. The branchiocardiac groove is rather deep 

 and runs obliquely in the direction of the angle betvveen the straight dorsal and the curved 

 lateral part of the posterior margin of the carapace, but it does not reach this margin and in 

 the adult male extends even not as far backwards as the median tubercle on the cardiac region. 

 It is of course erroneous when Caullerv (1. c.) remarks "Ie céphalothorax ne présente pas de 

 carène". The orbital spine is well-developed and extends in the adult male as far forward as 

 the 2 nd joint of the antennal peduncle, while the branchiostegal spine, that is directed obliquely 

 downvvard, is much smaller and shorter. 



In the adult male from Stat. 173 the abdomen, telson included, appears three times as 

 long as the carapace, the former being 94,5 mm. long, the carapace 32 mm.; the 6 th somite 

 is one and a half as long as the 5 th , the telson is broken at the tip. In the medium-sized 

 specimens it is as long as the endopodite of the caudal fan or a little longer, though shorter 

 than the exopodite, in the young specimens from the Stations 306 and 3 1 2 the telson is usually 

 even a little shorter than the endopodite. 



Only in a comparatively small number of specimens one or more of the three posterior 



